KP300 Helical Knurled Pins

SPIROL's FH300 Headed Helical Knurled Pin has the same body style as the KP300 Helical Knurled Pin, with the addition of a head. A Headed Pin is typically used to provide a positive stop or to retain a thin component to a thicker component within an assembly. FH300 Headed Helical Knurled Pins have a flat head, however they are available to order with a round head (RH300) to meet specific application requirements. Similar to the SPIROL Series KP300 Helical Knurled Pin offering, SPIROL's FH300 Headed Helical Knurled Pins are available in metric diameters ranging from Ø2mm to Ø6mm and inch diameters ranging from Ø.078" (5/64) to Ø.250" (1/4) in low carbon steel and austenitic stainless steel.

SPIROL's Knurled Pins are manufactured with two different knurl types: straight knurls and helical knurls. Unlike a Straight Pin, where retention is provided by the uniform interference between the pin and hole, Knurled Pins are designed to cut into the host. The displacement of the host material into the valleys of the knurls yields more frictional contact area between the Knurled Pin and hole; thus resulting in higher retention. Solid Pins with retention features such as knurls and barbs allow for wider hole tolerances than Solid Pins without retention features (i.e. Straight Pins).

SPIROL's DP100 Straight Pins have smooth outer diameters with no retention features such as knurls or barbs. When used as a press-fit pin, the DP100 Straight Pin is pressed into a hole sized slightly smaller than the diameter of the pin. SPIROL's DP100 Straight Pins are suitable for press fit in host materials that can withstand compression in the order of 0.05mm – 0.08mm (.002” – .003”). The actual recommended hole size for a press-fit depends on the actual host material. It is for this reason that SPIROL Engineering should be consulted for the recommended hole size when DP100 Straight Pins are intended to be press-fit into an assembly. Straight Pins are a great option for applications that do not require the tight tolerances of Machined Solid Pins or Ground Solid Dowels. SPIROL Series DP100 Straight Pin consists of metric diameters ranging from Ø2mm to Ø6mm and inch diameters ranging from Ø.078" (5/64) to Ø.250" (1/4).

Offered with or without a head, Straight Pins are distinguished by their uniformity. The chamfered ends are more consistent than tumbled edges—making installation with automatic assembly equipment more reliable. Straight Pins are retained by compressing the host, not the inflexible solid pin. They are suitable for use in plastics for press-fit applications limited to those cases where the host material can withstand compression in the order of 0.05mm – 0.08mm (.002” – .003”). Straight Pins are often used to replace Ground Dowels in applications that do not require the tight tolerances of a Ground Dowel.